Some layers come unstuck during print As I leave my printer going for a longer print, say 5+ hours, at some parts the layers are partially coming undone! Does anybody know what causes this and/or how I can fix thi? Thanks, -Jake [attachment 43941 image.jpg] [attachment 43942 image.jpg] [attachment 43943 image.jpg] https://reprap.org/forum/read.php?262,433779,433779#msg-433779 Sat, 06 Jun 2026 07:01:16 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?262,433779,435874#msg-435874 Re: Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,435874#msg-435874 forums.reprap.org]]]> abuharsky Printing Sun, 23 Nov 2014 17:49:35 -0500 https://reprap.org/forum/read.php?262,433779,433992#msg-433992 Re: Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,433992#msg-433992 If you find the adhesion is poor, and you are using a large layer height, then you may also want to try increasing the extrusion width in your slicer slightly.]]> Paul Wanamaker Printing Wed, 19 Nov 2014 01:08:14 -0500 https://reprap.org/forum/read.php?262,433779,433892#msg-433892 Re: Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,433892#msg-433892 zerodameaon Printing Tue, 18 Nov 2014 17:35:57 -0500 https://reprap.org/forum/read.php?262,433779,433866#msg-433866 Re: Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,433866#msg-433866
It is with ABS. When you say contain the heat and chamber, do you mean to say I should enclose the printer? I have been thinking of doing that because I turn the AC way down at night, and this mostly happens when I'm printing overnight. Also you say after the first few layers I should lower the temperature of the extruder? Currently I am printing at 230 C for the whole print.

Thanks for the help!

-Jake]]> Eqpirate07 Printing Tue, 18 Nov 2014 16:49:20 -0500 https://reprap.org/forum/read.php?262,433779,433793#msg-433793 Re: Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,433793#msg-433793
The plastic is shrinking more at the outside than the inside of the print, so it cracks. This will be worse with ABS than PLA, as ABS shrinks more. You didn't mention if you are using PLA or ABS.

For ABS - one solution is to contain the heat, near but below the glass transition temperature of ABS so there is less shrinkage while printing.

I had problems like you show when I used an Afinia printer to print wide with ABS, without a chamber, but still had some problems with another Afinia with a chamber - this only contained some of the heat.

You also may want to try printing some narrow parts and try breaking them to see how much adhesion there is between layers, and adjust your temperature.]]> Paul Wanamaker Printing Tue, 18 Nov 2014 13:43:42 -0500 https://reprap.org/forum/read.php?262,433779,433779#msg-433779 Some layers come unstuck during print https://reprap.org/forum/read.php?262,433779,433779#msg-433779
Thanks,

-Jake

[attachment 43941 image.jpg]

[attachment 43942 image.jpg]

[attachment 43943 image.jpg]]]> Eqpirate07 Printing Tue, 18 Nov 2014 13:04:37 -0500